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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-23274 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels IDLETIMER revision 0 rules reuse existing timers by label and always call mod_timer() on timer->timer. If the label was created first by revision 1 with XT_IDLETIMER_ALARM, the object uses alarm timer semantics and timer->timer is never initialized. Reusing that object from revision 0 causes mod_timer() on an uninitialized timer_list, triggering debugobjects warnings and possible panic when panic_on_warn=1. Fix this by rejecting revision 0 rule insertion when an existing timer with the same label is of ALARM type.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/144f88054ba0180467356f40895bd660b5dceeec kernel.org Patch 
https://git.kernel.org/stable/c/28c7cfaf0c0ab17cbd7754092116fd1af45271f9 kernel.org Patch 
https://git.kernel.org/stable/c/329f0b9b48ee6ab59d1ab72fef55fe8c6463a6cf kernel.org Patch 
https://git.kernel.org/stable/c/32e937dc6e97f5ed3cdfe3fc0b2b19a05e23fa44 kernel.org Patch 
https://git.kernel.org/stable/c/54080355999381fed4a26129579a5765bab87491 kernel.org Patch 
https://git.kernel.org/stable/c/5e7ece24c5cb75a60402aad4d803c7898ea40aa9 kernel.org Patch 
https://git.kernel.org/stable/c/f228b9ae2a7e84d1153616d8e71c4236cb1f1309 kernel.org Patch 
https://git.kernel.org/stable/c/f5ef97c13165542480a6ffdbe6f09f40bbb7cbf1 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-23274
NVD Published Date:
03/20/2026
NVD Last Modified:
05/22/2026
Source:
kernel.org